I need help with these questions: 1. According to:…

Question Answered step-by-step I need help with these questions: 1. According to:… I need help with these questions: 1. According to: http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/MagEarth.htmlClose to the Earth, its magnetic field looks like that of a bar magnet. Why do we know it can NOT be due to a permanent magnet inside the Earth?a) Because the Earth only has one magnetic poleb) Because the magnetic field changes with timec) Because there is no iron in the Earth’s interior  2. According to: https://ophysics.com/em3.htmlBased on the simulation showing the magnetic (B) and electric (E) field components, as well as the propagation (v), of electromagnetic waves, which of the following statements is correct?a) E, B, and v are all parallel to each otherb) E and B are parallel to each other, but perpendicular to v.d) E, B, and v are all perpendicular to each other.   3. The index of refraction for ruby is 1.76. If an experiment estimated the index of refraction for ruby to be 1.52, what is the percentage error in the experiment?a) 13.6%b) 14.6%  Science Physics PHYSICS 126 Share QuestionEmailCopy link Comments (0)